SmogRank / World / Mexico / Nuevo León / August 2025
Most polluted cities in Nuevo León, Mexico, August 2025
2 cities in Nuevo León, Mexico ranked by their average PM2.5 over the 31 days. Worst: Ciudad Benito Juárez at 14.8 µg/m³, #352 of 2,841 cities in the world. Cleanest: Monterrey at 14.3. A city needs measurements on 70% of the days to be ranked.
Nuevo León has 9 cities ranked over the last 30 days, but only 2 here: most of its monitors have no readings for August 2025 in OpenAQ's archive, where ours come from, or too few to rank. Cities missing from this board weren't clean, just not measured.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Ciudad Benito Juárez 0%
- 2Monterrey 0%
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
All cities in the world, August 2025 · All cities in Mexico, August 2025 · Nuevo León now
Use this board
SmogRank, most polluted cities in Nuevo León, Mexico, PM2.5, August 2025, smogrank.com/mx/region/nuevo-leon/history/2025-08 (accessed 6 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.